Lifting-jack



(No Model.)

A. HARRIS. LIFTING JACK.

N0. 430,946. Patented June 24, 1890.

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, By @mf/@@9774 UNITED STATES PATENT OEEICE.

ARTHUR HARRIS, OF INDEPENDENCE, MISSOURI.

LlFTlNG-SJACK.

SPECIFICATION forming part of Letters Iatent No. 430,946, dated June 24, 1890.

Application iiled March 25, 1890. Serial No. 345,224. (No model.)

To @ZZ whom it may concern:

Be it known that I, ARTHUR HAERIs, of In dependence, Jackson county, Missouri, have invented certain new and usefull Improvements in Lifting-Jacks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in lifting-jacks, designed more especially for lifting carriages and buggies when the spindles need oiling, but will answer the same purpose in lifting all kinds of vehicles, and may be said'to consist in the novel construction and combination of dieerent parts hereinafter more fully set forth and described.

In the drawings, Figure I is a perspective View of my jack, showing the position of it when placed under the axle of avehicle ready for hoisting. Fig. 2 is a cross-sectional view of my jack, showing the different parts and members of which itis constructed and the position it is in when the vehicle is hoisted. It will be observed in this view that when the lifting-lever is forced down to a horizontal position with the body of thejack the roller is held in position by the two side supporting'- bars, on which the lifting-bar rests, by means of the bolt F being secured in one of the series of openings in the lifting-bar. Aliftinglever is secured in the other end of the frame to which the above is secured, and is provided with a curved portion acting like a cam and a depression in its end. y

The roller above referred to, when the lifting-lever is moved, rides up the curved portion and over the end of the lever and rests in the said depression.

A represents the jack.

e is a shoulder or recess out iu the upper end of the lifting-bar.

E is the lifting-bar.

e e are openings through the lifting-bar, in which bolt F is placed.

c is a bolt passing through bars I I, pivoting them to upright D, and c is a bolt passing through the bars B B and lever C.

Next to the lifting-bar E,forming a perpendicular opening, through which the liftingbar moves up and down is an upright G.

.I is a block rigidly secured to the front ends of the bars B B, serving to limit the downward movement of the lifting-lever C.

L is the curved portion of the lever C, and K is a depression in the end of said lever, in which the anti-friction roller I-I rests and locks the liftingbar C in its elevated position. d is the journal on which the roller H turns, and by means of which the roller is secured between the bars I I. u

It will be observed that the pieces I I are pivoted at o to the standard D, and that as the lever C is pressed down the roller H rides up the incline I1, said roller being secured between the pieces I I, thus raising the pieces I I up, and by means of the bolt F raises 'the lifting-bar E.

That I claim, and desire to secure by Letters Patent, is

The lever' C, having a gradual inclined portion L and a depression K in its end, the pivot-ed bars I I, an anti-friction roller securedl between said bars, the lifting-barE,having a shoulder e', the standard I), and upright G, all mounted and operating substantially as described.

In testimony whereof I aiiix my signature in presence of two witnesses.

, ARTHUR HARRIS.

Witnesses:

II. E. PRICE, A. A. HIenoN. 

